Apollo Spacecraft S Band Communication System, Part 13

With a simulated data link tested using modern test equipment, the next challenge is getting the original vintage Apollo ground test equipment to talk to the flight hardware transponder. Will the conversion of the test equipment back to its original Apollo configuration, with all of the complexities of custom crystals, retuning microwave black magic circuitry, so the job?

(The part number in the title card for the video is incorrect: this is part 13.)